/*
 * Copyright (c) 2001, Zoltan Farkas All Rights Reserved.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */
package org.spf4j.stackmonitor;

import edu.umd.cs.findbugs.annotations.SuppressWarnings;
import java.util.Arrays;

/**
 *
 * @author zoly
 */
public final class StackTrace {
    
    private final StackTraceElement[] stackTrace;
    
    private final int relevantFramesStart;

    @SuppressWarnings("EI_EXPOSE_REP2")
    public StackTrace(final StackTraceElement[] stackTrace, final int relevantFramesStart) {
        this.stackTrace = stackTrace;
        this.relevantFramesStart = relevantFramesStart;
    }
    
    public static StackTrace from(final StackTraceElement[] stackTrace, final int relevantFramesStart) {
        return new StackTrace(stackTrace, relevantFramesStart);
    }

    @SuppressWarnings("EI_EXPOSE_REP")
    public StackTraceElement[] getStackTrace() {
        return stackTrace;
    }

    @Override
    public int hashCode() {
        int hash = 7;
        return 53 * hash + Arrays.deepHashCode(this.stackTrace);
    }

    @Override
    public boolean equals(final Object obj) {
        if (obj == null) {
            return false;
        }
        if (getClass() != obj.getClass()) {
            return false;
        }
        final StackTrace other = (StackTrace) obj;
        if (!org.spf4j.base.Arrays.deepEquals(this.stackTrace, other.stackTrace, relevantFramesStart)) {
            return false;
        }
        return true;
    }

    @Override
    public String toString() {
        StringBuilder result = new StringBuilder();
        for (int i = relevantFramesStart; i < stackTrace.length; i++) {
            StackTraceElement elem = stackTrace[i];
            result.append(elem.getMethodName()).append('@').append(elem.getClassName()).append("->");
        }
        return result.toString();
    }
    
    
    
}
